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Finding the Fourth Proportional to 129,783.60, 194,675.40 and 79,701.30

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Solution

The fourth proportional to 129,783.60, 194,675.40 and 79,701.30 is: 119,551.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,783.60 : 194,675.40 = 79,701.30 : x
  2. Step 2: Convert to fraction form
    129,783.60/194,675.40 = 79,701.30/x
  3. Step 3: Cross multiply
    129,783.60x = 194,675.40 × 79,701.30
  4. Step 4: Simplify right side
    129,783.60x = 15,515,882,458.02
  5. Step 5: Solve for x
    x = 15,515,882,458.02/129,783.60
  6. Step 6: Final answer
    x = 119,551.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.